Improvement in devices for opening and closing doors of furnaces



H. A'. STABLEB. DEVIOESFOR OPENING AND CLOSING DOORS OF FURNACES, &c.

No. 194,008. Y PatentedAug. 7,1877.

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UNITED ,STATES PATENT QEEIc-E.v t

HENRY A. STADLER, OF NEW YORK, N. Y.

IMPROVEMENT IN DEVICES FOR OPENING AND CLOSING DOORS 0F FURNACES, &c.

Specification forming part of Letters Patent N o 194,038, dated August 7, 1877; application led 1 July 21, 1871.

To all whom it may concer/n:

` Be it known that I, HENRY A. STADLER, of the city and State of New York, have invented a new and useful Improvement in Devices for Opening and Closing the Doors of Furnaces, Ovens, and other Heated Structures or Chambers, of which the following is a description, reference being had to the accompanying drawing, forming part of this specilication.

This invention is more particularly designed tobe applied to the doors of ovens or furnaces provided with illuminating apparatus, substantially as described in Letters Patent N o. 190,637, issued to me May 8, 1877 but it is equally applicable to the doors of other furnaces or heated structures or chambers.

The invention consists in a combination, with the oven or furnace door, of a freely-connected stepped or notched rod or bar, constructed to form a handle, and a ixed guard or rail, arranged to support said bar or rod, and with which the latter (that serves to open and close the door) is made to engage, to hold the door closed, or more or less open, where-v by a convenient means is aiorded for controlling the opening and closing of the oven or furnace door, and of holding it securely closed or partly closed, as required, without exposing the operator to injury or molestation by the heat of the oven or furnace.

Figure 1 represents `a vertical section of an oven or furnace door and mouth-piece thereof with my invention applied, and Fig. 2 a horizontal section of the same on the line w .an eyebolt, b-with, the outer face or side of the door. This bar, which is constructed to form, or is provided with, an outer handle, c, that, when separately fitted, may be of wood,

has oneor more notches or steps, d, in its lower edge. Said bar serves as a convenient means for opening and closing the door withf out exposing the operator to injury or molesta tion by the heat of the oven or furnace, and

yits steps ornotches d, by their engagement with a fixed outer guard or rail, D, on which said bar rests or is supported, serve to hold the door securely closed or partly open, as required.

I claim- The combination, with the oven or furnace door, of a freelyconnected rod or bar, constructed to form a handle, also providedl with one -or more steps or notches on its under edge, and the fixed guard or rail, arranged to support said bar, and serving, by the engagement ofthe steps or notches of the rod or bar with it, to hold the door closed or partly open, as required, substantially as specified.

HENRY A. sTADLEE. 

